Bimetallic transition metal catalysts for hydrogen release from ammonia

In the context of the ongoing renewable energy transition, ammonia has been recognized as a promising hydrogen carrier, enabling hydrogen production via ammonia decomposition. This perspective focuses on the bimetallic transition catalysts in ammonia decomposition. Firstly, it outlines various approaches for the design of bimetallic catalysts, including alloying Ru with non-noble transition metals, Mo-based bimetallic nitrides, combining Fe with transition metal showing low nitrogen binding energy. Consequently, the alloyed FeCo bimetallic catalyst exhibits an optimized nitrogen binding energy (closet to Ru), which facilitates the recombinative N 2 desorption while suppressing the migration of nitrogen into the bulk of alloy, resulting in a high catalytic performance. Combining Ru with non-noble metals such as Ni, Fe, Co, etc. to fabricate a highly active bimetallic catalyst for ammonia decomposition has been summarized. Then the importance of advanced kinetic studies for the reaction mechanism investigation is emphasized inside. Perspectives for the future research on the fundamental understanding of intrinsic structure-performance relationship for bimetallic catalysts design is discussed.